PostHog is an open-source product analytics platform that combines event tracking, session replay, feature flags, A/B experiments, and surveys in a single self-hostable or cloud solution. It has become the default analytics stack for privacy-conscious SaaS teams and engineering-led organisations who want to own their data.
Product Overview
PostHog's key differentiator is breadth: where Mixpanel does analytics and FullStory does session replay, PostHog does both — plus feature flags, experiments, and user surveys. The open-source codebase means teams can self-host on their own infrastructure, keeping sensitive user data entirely in-house. The autocapture feature records all user interactions by default, eliminating the need to manually instrument every event before analysis.
Key Features
- Autocapture: Records all clicks, form inputs, and page views automatically — retroactive analysis without upfront instrumentation.
- Session Replay: Watch individual user sessions with full event timeline, network logs, and console errors.
- Feature Flags: Roll features out gradually by user segment, with instant kill-switch if issues arise.
- A/B Experiments: Run multivariate experiments with statistical significance tracking directly in PostHog.
- Self-Hosting Option: Deploy PostHog on your own infrastructure via Docker or Kubernetes for complete data ownership.
Best For
Engineering-led startups and scale-ups that want a complete product data stack in one tool, or teams with privacy requirements that need to self-host their analytics data.
Pricing
Generous free cloud tier (1M events/month free). Paid tiers start at $0 and scale with usage — typically $0–$450/month for mid-sized products. Self-hosting is always free.
Key Integrations
Segment, Zapier, Slack, Salesforce, HubSpot, BigQuery, Snowflake, Sentry, Stripe
Pros
- All-in-one: analytics + session replay + feature flags + experiments
- Open-source with self-hosting option
- Generous free tier
- Strong engineering culture and fast shipping
Cons
- UI less polished than Mixpanel
- Self-hosting requires DevOps expertise
- Feature flags/experiments less mature than dedicated tools like LaunchDarkly
RevOps Jobs-to-Be-Done
- Product Analytics and Funnel Analysis — Track user actions, build conversion funnels, and analyze retention cohorts with PostHog's event-based product analytics — with both autocapture and manual instrumentation options. KPI: Product teams identify onboarding friction within days; ship improvements 2× faster with data
- Session Recording and Heatmaps — Watch session recordings of real user sessions and view heatmaps showing where users click, scroll, and hover — understanding the 'why' behind quantitative funnel drop-offs. KPI: UX issues discovered in session recordings that would take 2–3 sprint cycles to surface through A/B testing
- Feature Flags and A/B Testing for Engineering Teams — Deploy feature flags to control feature rollout, run A/B tests with statistical significance monitoring, and correlate feature adoption with user behavior — all without leaving PostHog. KPI: Engineering ships features 30% faster with gradual rollout using feature flags vs. full-release approach
How It Fits Your Stack
Primary system of record: Product database — PostHog is event-driven with self-hosting option
Key integrations: Segment, Zapier, HubSpot, Salesforce, Slack, GitHub (feature flag sync), Snowflake
Data flows: Events captured via PostHog SDK or autocapture → analytics dashboards built → feature flags managed → session recordings stored → data synced to data warehouse
Security & Compliance
- SSO / SAML: SAML 2.0, Okta
- RBAC / permissions: Yes
- Audit logs: Yes
- Certifications: SOC 2 Type II, GDPR, HIPAA (self-hosted)
- Data residency: US, EU cloud; self-hosted option
Implementation & Ownership
- Time to first value: Same day — JS snippet or SDK; free tier includes 1M events/month
- Implementation complexity: Low
- Typical owners: Product Manager, Growth Engineer, Developer
Open-source and self-hostable — strong choice for privacy-conscious teams or those wanting data ownership; free cloud tier is extremely generous; replaces separate session recording, analytics, and feature flag tools
Proof & Buyer Signals
Ratings: G2: 4.5/5 (300+ reviews); widely adopted by Y Combinator startups
What buyers praise:
- Open-source and self-hostable
- Generous free tier
- All-in-one product tools (analytics + replay + flags)
- Developer-friendly
Common complaints:
- Enterprise support requires paid tier
- UI less polished than Amplitude
- Self-hosting requires DevOps resource
Often Compared With
- Heap — Heap is stronger for enterprise retroactive autocapture; PostHog is open-source with a more complete toolset (analytics + replay + flags) at lower cost
- FullStory — FullStory has more mature session replay and DX Data; PostHog combines session replay with product analytics and feature flags in one open-source platform
- Amplitude — Amplitude is the enterprise product analytics leader with stronger experimentation; PostHog is the open-source alternative with comparable core features plus session replay and feature flags
